public class Bottle<T extends Drink> {

	
	private T content;
	
	public boolean isEmpty(){
		return content==null;
	}
	
	public void fill(T content){
		this.content=content;
	}
	
	public T empty(){
		T temp = content;
		content = null;
		return temp;
	}
	
	public T getContent(){
		return content;
	}
}
